COMPARATIVE EVALUATION OF CANINE RETRACTION USING NITI CLOSED COIL SPRING AND ELASTIC CHAIN AT CAN THO UNIVERSITY OF MEDICINE AND PHARMACY HOSPITAL

Ngoc Hanh Ma1,, Nhut Khue Truong1, Nguyen Lam Le1
1 Can Tho University of Medicine and Pharmacy

Main Article Content

Abstract

Background: Canine retraction and space closure is considered the most time-consuming phase in orthodontic treatment. Acceleration of this step would reduce overall treatment time, improve patient cooperation, and decrease possible negative side effects. The wide use of NiTi coil springs for canine retraction can be attributed to their relatively constant force delivery, hence, reducing the number of appliance reactivations. On the other hand, elastomeric chains deliver an interrupted force that provides periods of rest allowing for regeneration and better tolerance of the supporting tissues. Objectives: To compare postextraction space closure speed using two different sliding mechanisms, Niti closed coil spring and elastic chain within treatment with fixed orthodontic appliances. Materials and methods: Randomized controlled trials (RCT) with split-mouth designs was conducted on 31 patients with indications for first premolar extraction. Sampling method: convenient sampling selected all patients who came to the Can Tho University of Medicine and Pharmacy Hospital from August 2022 to September 2023 who met the sample selection criteria.


Results: The percentage  of  female  patients  was  75.8%,  and  the  most  popular  chief  complaint  was  related  to  aesthetics (64,5%).The speed of Niti closed coil spring was faster than elastic chain group 1.3 times. Conclusions: Niti closed coil spring lead to faster closure of postextraction spcaes in relation to elastic chain.  

Article Details

References

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